import Vue from 'vue'
import VueRouter from 'vue-router'
import login from '../components/login.vue'
import home from '../components/home.vue'
import welcome from '../components/welcome.vue'
import users from '../components/user/users.vue'
import Rights from '../components/power/Rights.vue'
import Roles from '../components/power/Roles.vue'
import Cate from '../components/goods/Cate.vue'
import params from '../components/goods/params.vue'
import goodsList from '../components/goods/List.vue'
import Add from '../components/goods/Add.vue'
import Order from '../components/order/Order.vue'
import Report from '../components/report/Report.vue'

Vue.use(VueRouter)

const router = new VueRouter({
  routes: [{ path: '/', redirect: '/login' },
    { path: '/login', component: login },
    { 
      path: '/home', component: home ,redirect: '/welcome',
      children:[ 
          { path:'/welcome',component: welcome},
          { path:'/users',component:users},
          { path:'/rights',component:Rights},
          { path:'/roles',component:Roles},
          { path:'/categories',component:Cate},
          { path:'/params',component:params},
          { path: '/goods', component: goodsList},
          { path: '/goods/add', component: Add },
          { path: '/orders', component: Order },
          { path: '/reports', component: Report }
              ]
    }
  ]
})

//挂载路由导航守卫
router.beforeEach((to, from, next) => {
  // to 将要访问的路径
  // from 代表从哪个路径跳转而来
  //next 是一个函数，表示放行
  //  next() 放行   next('/login')  强制跳转
  if(to.path === '/login') return next();
  // 先获取 token
  const tokenStr = window.sessionStorage.getItem('token') 
  // 如果跳转失败就跳转到登录页，否则放行
  if(!tokenStr) return next('/login')
  next()
})

export default router
